<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>原生Ajax</title>
</head>

<body>
    <input type="button" value="获取数据" onclick="getData()">
    <div id="div1"></div>
</body>
<script>
    function getData() {
        // 1. 创建XMLHttpRequest
        var xmlHttpRequest = new XMLHttpRequest();

        // 2. 发送异步请求
        xmlHttpRequest.open('GET', 'https://mock.apifox.cn/m1/3128855-0-default/emp/list');
        xmlHttpRequest.send(); // 发送请求

        // 3. 获取服务响应数据
        xmlHttpRequest.onreadystatechange = function () {
            if (xmlHttpRequest.readyState == 4 && xmlHttpRequest.status == 200) {
                document.getElementById('div1').innerHTML = xmlHttpRequest.responseText;
            }
        }
    }
</script>

</html>